CN111945752A - Frame anchor supporting construction suitable for native slope self-adaptation warp control expands - Google Patents
Frame anchor supporting construction suitable for native slope self-adaptation warp control expands Download PDFInfo
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- CN111945752A CN111945752A CN202010832176.9A CN202010832176A CN111945752A CN 111945752 A CN111945752 A CN 111945752A CN 202010832176 A CN202010832176 A CN 202010832176A CN 111945752 A CN111945752 A CN 111945752A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/202—Securing of slopes or inclines with flexible securing means
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
- E02D5/765—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor removable
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/14—Geometrical or physical properties resilient or elastic
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/14—Geometrical or physical properties resilient or elastic
- E02D2200/146—Springs
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2450/00—Gaskets
- E02D2450/10—Membranes
- E02D2450/105—Membranes impermeable
- E02D2450/106—Membranes impermeable for liquids
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a frame anchor supporting structure for self-adaptive deformation control of an expansive soil side slope, which comprises a waterproof geomembrane, a drainage groove, a frame beam, an anchor rod and a self-adaptive deformation control module, wherein the waterproof geomembrane is laid on the slope surface and the top of the expansive soil side slope, and the drainage groove is formed in the region where the waterproof geomembrane is not laid on the top of the expansive soil side slope and the slope toe; the frame beam is arranged on the waterproof geomembrane on the slope surface of the expansive soil slope, and the anchor rod is arranged at the intersection point of the frame beam; the self-adaptive deformation control module comprises a baffle plate, an air cavity, an air duct, a rigid connecting block, a high-strength spring and an air valve. According to the invention, the self-adaptive deformation control module is applied among the lattices of the existing frame beam, and the air cavity filled with high-pressure inert gas is combined with the existing frame beam supporting structure to adapt to and control the deformation of the expansive soil side slope in any form, so that the problems that the expansive soil side slope supported by the traditional frame anchor structure has a shallow layer slip crack surface and is separated from the frame anchor supporting structure are avoided, and the stability of the expansive soil side slope is effectively ensured.
Description
Technical Field
The invention relates to the technical field of expansive soil slope support, in particular to a frame anchor support structure suitable for expansive soil slope self-adaptive deformation control.
Background
The expansive soil is a special cohesive soil which is very sensitive to moisture and has the reversibility characteristics of rapid expansion after meeting water and shrinkage and cracking after dehydration. The expansive soil has higher strength under the dry condition, and can be expanded and softened after meeting water, so that the strength is greatly reduced. The expansive soil is a special soil with extremely high harmfulness in the actual engineering, and the instability problem of the expansive soil side slope causes high attention in the engineering field. For expansive soil side slopes, the traditional anchor rod frame beam supporting structure cannot well maintain the stability of the side slopes, and especially, the exposed expansive soil among the lattices is easy to generate larger expansion and contraction deformation so that the expansive soil side slopes are easy to generate shallow layer damage or separate from the frame anchor supporting structure, and the frame anchor structure is damaged so that the side slopes are unstable. In view of the problem, the chinese invention patent with patent number 201611081583.0 discloses an expansive soil cutting side slope reinforced soil back pressure anti-seepage support structure, which comprises an expansive soil cutting side slope, a toe block support structure, a slope surface provided with a geomembrane anti-seepage structure, a reinforced soil slope surface protection structure and an anchor rod system, and a top slope pressure anti-seepage structure; this supporting construction can improve the stability of inflation soil side slope to a certain extent, nevertheless can appear backfilling reinforced earth arch after using through a period of time and break apart, and the collapse scheduling problem appears in the long side slope of time one.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides the frame anchor supporting structure suitable for the self-adaptive deformation control of the expansive soil side slope, avoids the problems that the expansive soil side slope supported by the traditional frame anchor structure has a shallow layer slip crack surface and is separated from the frame anchor supporting structure, and effectively maintains the stability of the expansive soil side slope.
In order to achieve the purpose, the invention provides a frame anchor supporting structure for self-adaptive deformation control of an expansive soil side slope, which comprises a waterproof geomembrane, a drainage groove, a frame beam, an anchor rod and a self-adaptive deformation control module, wherein the waterproof geomembrane is laid on a slope surface and a slope top of the expansive soil side slope, and the drainage groove is formed in a region where the waterproof geomembrane is not laid on the slope top and a slope toe of the expansive soil side slope; the frame beams are arranged on the waterproof geomembrane on the slope surface of the expansive soil slope, and a plurality of cross beams and a plurality of longitudinal beams of the frame beams are arranged in a mutually crossed manner to form a plurality of rectangular lattices; at least one anchor rod is arranged at each intersection of the cross beam and the longitudinal beam; the self-adaptive deformation control module comprises a baffle detachably fixed on the frame beam and an air cavity adaptive to a waterproof geomembrane arranged in the corresponding lattice, a plurality of air ducts communicated with the air cavity and an air valve used for filling or exhausting air to the air cavity are arranged on the left wall of the air cavity, namely the wall surface of the air cavity far away from the waterproof geomembrane, rigid connecting blocks for dividing the inner cavity of the air duct into a left closed air chamber and a right closed air chamber are arranged in each air duct, high-strength springs are arranged between all the rigid connecting blocks and the baffle, one end of each high-strength spring is fixed on the baffle, and the other end of each high-strength spring is fixedly connected to the rigid connecting block; the air chambers at the sides of the air ducts far away from the air cavity are communicated with each other through the connecting pipes, so that the high-strength springs deform the same, the maximum spring force borne by the baffle is reduced, and the baffle is effectively prevented from being damaged due to overlarge spring force; high-pressure inert gas is filled in the air cavity and the air guide pipes, so that the right wall of the air cavity, namely the wall surface of the air cavity close to the waterproof geomembrane, can be always attached to the surface of the waterproof geomembrane, and the air pressure on two sides of the rigid connecting block is equal in an initial state; the rigid connecting block can move along the axial direction of the air guide pipe under the action of left and right gas pressure difference or the elastic force of the high-strength spring, so that the effect of controlling the deformation of the expansive soil is achieved.
Further, the expansive force of the expansive soil slope is 100-200 kPa; the air pressure of inert gas filled in the air cavity and the plurality of air guide pipes is 200-300 kPa, and the inert gas is helium.
Furthermore, the right wall of the air cavity is made of a high-strength material which can be deformed at will, and the side wall and the left wall of the air cavity are both made of a high-strength material which cannot be deformed, so that the air in the air cavity only flows in the air guide pipe when the air cavity is deformed and extruded by the expansive soil slope.
Further, the tube wall of the air guide tube is made of a non-deformable high-strength material; the rigid connecting block is in sealing contact with the inner wall of the air guide pipe and can move along the axial direction of the air guide pipe.
Furthermore, arc transitional connection is adopted between the air duct and the air cavity, between the air duct and the connecting pipe, and between the tail end of the air duct and the side wall of the air duct.
Further, the frame beam and the baffle are both of a concrete structure, and the rigid connecting block is a steel block body with a sealing ring arranged on the periphery.
Furthermore, the left wall surface and the right wall surface of the air cavity are parallel, namely, the whole air cavity is of a flat cuboid structure, and the length directions of the air guide pipes are perpendicular to the left wall surface and the right wall surface of the air cavity.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the frame-anchor supporting structure, the self-adaptive deformation control module is arranged between the lattices of the traditional anchor rod frame beam supporting structure, the self-adaptive deformation control module combines the air cavity filled with high-pressure inert gas with the traditional anchor rod frame beam supporting structure to adapt to the deformation of any form of expansive soil slope, and when the expansive soil slope deforms in any form, the right side wall of the air cavity can tightly cling to the surface of the expansive soil slope; the air cavity is connected with the high-strength spring through the air duct, and when the expansive soil is subjected to expansion and contraction deformation, the inert gas in the air cavity pushes the spring to deform, so that the effect of controlling the deformation of the expansive soil is achieved; the gas guide pipe and the inert gas convert any deformation of the expansive soil slope into linear deformation, and the linear deformation is matched with the characteristic that the high-strength spring can only generate linear deformation; because the high-pressure inert gas is adopted, the right side surface of the air cavity can still tightly cling to the surface of the expansive soil slope when the rigid connecting block is balanced again under the action of the elastic potential energy of the high-strength spring, and no gap is generated. The invention can effectively inhibit the deformation of the expansive soil slope, avoid the problems that the expansive soil slope supported by the traditional frame anchor structure has a shallow layer slip crack surface and is separated from the frame anchor supporting structure, and improve the stability of the expansive soil slope supported by the side slope anchor rod frame beam.
(2) In the frame anchor supporting structure, the self-adaptive deformation control module is arranged on the traditional anchor rod frame beam supporting structure by adopting an assembly method, so that the adjustment, maintenance and replacement after disassembly are convenient.
(3) According to the frame anchor supporting structure, after the frame anchor supporting structure is used for a certain period, the air pressure of the rigid connecting block is adjusted and balanced in a mode of filling air into the air cavity or exhausting air from the air valve, so that the high-strength spring is located at the original position, and the self-adaptive deformation control module can be used periodically for a long time.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic illustration of a frame-anchored support structure for expansive soil slope adaptive deformation control in accordance with the present invention;
FIG. 2 is a schematic cross-sectional view A-A of the adaptive deformation control module of FIG. 1;
wherein: 1-waterproof geomembrane, 2-expansive soil slope, 3-drainage channel, 4-frame beam, 5-anchor rod, 6-adaptive deformation control module, 6.1-baffle, 6.2-air cavity, 6.3-air duct, 6.4-rigid connecting block, 6.5-high-strength spring, 6.6-air valve, 6.7-screw and 6.8-connecting pipe.
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Referring to fig. 1, a frame-anchor supporting structure for expansive soil slope adaptive deformation control includes a waterproof geomembrane 1, a drainage channel 3, a frame beam 4, an anchor rod 5 and an adaptive deformation control module 6; the concrete structure is as follows:
the waterproof geomembrane 1 is laid on the slope surface and the slope top of the expansive soil side slope 2, and the drainage grooves 3 are formed in the areas where the waterproof geomembrane 1 is not laid on the slope top and the slope toe of the expansive soil side slope 2. The frame beam 4 comprises a plurality of cross beams arranged in parallel and a plurality of longitudinal beams arranged in parallel, and the cross beams and the longitudinal beams are mutually crossed to form a plurality of rectangular lattices; the frame beam 4 is arranged on the waterproof geomembrane 1 on the slope surface of the expansive soil side slope 2 and is fixed on the rear bedrock of the expansive soil side slope through the anchor rod 5; at least one anchor rod 5 is arranged at each intersection point of the cross beam and the longitudinal beam. The frame beam 4 is of a concrete structure, and the anchor rod 5 is a steel bar with one end connected to the intersection point of the frame beam 1 and the other end anchored in the rear bedrock of the expansive soil slope 2.
As shown in fig. 2, a self-adaptive deformation control module 6 is respectively installed in all the lattices of the frame beam 4, the self-adaptive deformation control module comprises a baffle 6.1, an air cavity 6.2, air ducts 6.3, rigid connecting blocks 6.4, high-strength springs 6.5 and air valves 6.6, the baffle 6.1 is detachably fixed on the frame beam 4 through screws 6.7, the air cavity 6.2 is arranged in the corresponding lattice, the four peripheral walls of the air cavity are contacted with the inner walls of the lattice, a plurality of air ducts 6.3 communicated with the air cavity 6.2 and air valves 6.6 used for filling or exhausting air into the air cavity 6.2 are arranged on the left wall of the air cavity, namely the wall surface of the air cavity far away from the waterproof geomembrane, a rigid connecting block 6.4 for dividing the inner cavity into a left air chamber and a right air chamber is arranged in each air duct, a high-strength spring 6.5 is arranged between each rigid connecting block and the baffle; that is, the end of the high-strength spring connected with the rigid connecting block is inserted into the air duct from the tail end of the air duct, and the high-strength spring is connected with the tail end of the air duct in a sealing and sliding manner. High-pressure inert gas is filled in the air cavity and the air guide pipes, and the air pressure on two sides of the rigid connecting block 6.4 is equal in the initial state; the rigid connecting block 6.4 can move along the axial direction of the air guide pipe 6.3 under the action of left-right air pressure difference or the elastic force of the high-strength spring 6.5. The air chambers of the air ducts 6.3 far away from one side of the air chamber 6.2 are communicated with each other through the connecting pipes, so that the deformation of the high-strength springs 6.5 is controlled to be the same, the maximum spring force borne by the baffle 6.1 is reduced, and the baffle is effectively prevented from being damaged due to overlarge spring force. The baffle 6.1 is detachably fixed on the frame beam 4 through a screw 6.7, the frame anchor supporting structure is used as a counterforce device by adopting an assembly type self-adaptive deformation control module, the expansion and contraction deformation of the expansive soil slope is effectively resisted, and the assembly type structure is convenient to detach, maintain, replace and install.
In a specific embodiment, since the expansive force of the expansive soil is mostly 100 to 200kPa, the initial pressure of the inert gas to be filled is 2 to 3 standard atmospheres, thereby effectively suppressing the expansive deformation of the expansive soil. Specifically, the air pressure of the inert gas filled in the air cavity 6.2 and the plurality of air guide pipes 6.3 is 200-300 kPa, and the inert gas is helium.
In a particular embodiment, the right wall of the air cavity 6.2 is made of a high strength material that can be deformed at will to accommodate any form of deformation of the expansive soil slope and facilitate deformation of the air cavity when the expansive soil slope is deformed, and to maintain its constant conformity with the expansive soil slope surface. The side wall and the left wall of the air cavity are both made of non-deformable high-strength materials, so that the gas in the air cavity only flows in the air guide pipe. The high-strength material which can be arbitrarily deformed can be high-strength plastic with good ductility and toughness, such as a high-strength pvc film; the non-deformable high-strength material may be made of metal such as steel or iron, or engineering plastic such as PEEK with high strength.
In a particular embodiment, the walls of the airway tube 6.3 are made of a non-deformable, high-strength material; the rigid connecting block 6.4 is in sealing contact with the inner wall of the air duct 6.3 and can move along the axial direction of the air duct. The preferred rigid connecting block 6.4 is a steel block with a sealing ring at the periphery. The structure adopts the air cavity filled with high-pressure inert gas to adapt to any form of deformation of the expansive soil side slope, and when the expansive soil side slope deforms in any form, the air in the air cavity flows in the air guide pipe, so that the high-strength spring is driven to compress or stretch to generate elastic resistance, the supporting performance of the frame anchor structure on the expansive soil side slope is enhanced, and the stability of the expansive soil side slope is kept.
In a specific embodiment, the air duct 6.3 and the air chamber, the two air ducts 6.3 and the connecting pipe 6.8 and the tail end of the air duct 6.3 and the side wall of the air duct 6.3 are all in arc transition connection, so that damage and air leakage caused by overlarge pressure can be avoided. And the arc transition structures are made of non-deformable high-strength plastic materials.
In a specific embodiment, when the expansive soil slope has a tendency of expansion and contraction deformation, the shape of the surface of the right side of the air cavity in contact with the expansive soil slope is changed, so that the volume of the air cavity is changed, and the air pressure on the right side of the rigid connecting block is changed according to an ideal gas law pV ═ nRT. The air pressure on the two sides of the rigid connecting block is unbalanced, so that the air in the air cavity flows in the air guide pipe, and the high-strength spring is driven to compress or stretch. And then the rigid connecting block is balanced again under the action of elastic potential energy, and the right wall of the air cavity can still be tightly attached to the surface of the expansive soil slope, so that a gap is not generated.
In a specific implementation mode, after the expansive soil is deformed for a plurality of times, the high-strength spring is not in the original position, so that the self-adaptive deformation control module 6 can be detached, and the air pressure of the rigid connecting block is adjusted and balanced in a mode of aerating or exhausting air to the air cavity through the air valve, so that the high-strength spring is in the original position, and the self-adaptive deformation control module can be repeatedly used for a long time.
In one embodiment, the adaptive deformation control module 6 structure is surrounded by frame beams and baffles to protect it from external interference, extending its useful life.
In a specific embodiment, the waterproof geomembrane 1 and the drainage channels 3 cut off the connection between the expansive soil slope and water, and the slope deformation is controlled from the source.
In a specific embodiment, the left wall surface and the right wall surface of the air cavity are parallel, namely, the whole air cavity is of a flat cuboid structure, and the length directions of the plurality of air guide pipes 6.3 are all set to be perpendicular to the left wall surface and the right wall surface of the air cavity. Or the left wall surface and the right wall surface of the air cavity are not parallel, as long as the right wall surface is tightly attached to the surface of the side slope, and the air guide pipe is perpendicular to the slope surface of the expansive soil side slope.
The construction steps of the frame anchor supporting structure for the self-adaptive deformation control of the expansive soil slope of the invention are explained as follows:
1) carrying out geotechnical engineering investigation on the engineering field, and determining the design size of the anchor rod frame beam structure according to design requirements.
2) Determining the design sizes and spatial positions of the self-adaptive deformation control module 6, the waterproof geomembrane 1 and the drainage channel 3, and determining mechanical parameters such as the selection density of helium, the selection rigidity of the high-strength spring 6.5 and the like.
3) Laying a waterproof geomembrane 1 and excavating a drainage channel 3.
4) After the waterproof geomembrane 1 is laid, the frame beam 4 and the anchor rod 5 are prefabricated and installed, and the self-adaptive deformation control module 6 is installed between the lattices through bolts 6.7.
According to the frame-anchor supporting structure, when the expansive soil slope generates an expansion and contraction deformation trend, gas in the gas cavity flows in the gas guide pipe, so that the high-strength spring is driven to compress or stretch to generate elastic resistance, the supporting performance of the supporting structure on the expansive soil slope is enhanced, the deformation of the expansive soil slope is effectively inhibited, the problems that the expansive soil slope supported by the traditional frame-anchor structure has a shallow layer slip surface and is separated from the frame-anchor supporting structure are solved, and the stability of the expansive soil slope is maintained. The invention adopts the air cavity filled with high-pressure inert gas to adapt to any form of deformation of the expansive soil slope, and when the expansive soil slope deforms in any form, the right wall of the air cavity can tightly cling to the surface of the expansive soil slope; the gas guide pipe and the inert gas convert any deformation of the expansive soil slope into linear deformation, and the linear deformation is matched with the characteristic that the high-strength spring can only generate linear deformation; the rigid connecting block is balanced again under the action of the elastic potential energy of the high-strength spring, and the right wall of the air cavity can still be tightly attached to the surface of the expansive soil slope after the high-strength spring is reset due to the adoption of high-pressure inert gas with the pressure greater than the standard atmospheric pressure, so that no gap is generated; the air pressures on two sides of the rigid connecting block are adjusted and balanced in a mode of adding air or extracting air from the air valve to the air cavity, so that the high-strength spring is positioned at the original position, and the supporting structure can be used for a long time; the air chambers at the sides of the air ducts far away from the air cavity are communicated with each other, so that the elasticity of the high-strength springs is the same, the maximum spring elasticity borne by the baffle is reduced, and the baffle is effectively prevented from being damaged due to overlarge spring elasticity; the assembled self-adaptive deformation control module is adopted, the frame anchor supporting structure is used as a counterforce device, the expansion and contraction deformation of the expansive soil slope is effectively resisted, and the assembled structure is convenient to detach, maintain, replace and install.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A frame anchor supporting structure for self-adaptive deformation control of an expansive soil side slope is characterized by comprising a waterproof geomembrane (1), a drainage channel (3), a frame beam (4), an anchor rod (5) and a self-adaptive deformation control module (6), wherein the waterproof geomembrane (1) is laid on the slope surface and the top of the expansive soil side slope (2), and the drainage channel (3) is arranged in the region where the waterproof geomembrane (1) is not laid on the top of the expansive soil side slope (2) and on the slope toe; the frame beam (4) is arranged on the waterproof geomembrane (1) on the slope surface of the expansive soil side slope (2), and a plurality of cross beams and a plurality of longitudinal beams of the frame beam (4) are mutually crossed to form a plurality of rectangular lattices; at least one anchor rod (5) is arranged at each intersection of the cross beam and the longitudinal beam; a self-adaptive deformation control module (6) is respectively arranged in all the lattices of the frame beam (4), the self-adaptive deformation control module (6) comprises a baffle (6.1) detachably fixed on the frame beam (4) and an air cavity (6.2) adapted to the waterproof geomembrane (1) in the corresponding lattice, a plurality of air ducts (6.3) communicated with the air cavity (6.2) and an air valve (6.6) used for filling or exhausting air to or from the air cavity (6.2) are arranged on the left wall of the air cavity, namely the wall surface of the air cavity far away from the waterproof geomembrane (1), each air duct is internally provided with a rigid connecting block (6.4) which divides the inner cavity of the air duct into a left closed air chamber and a right closed air chamber, a high-strength spring (6.5) is arranged between each rigid connecting block (6.4) and the baffle (6.1), one end of the high-strength spring (6.5) is fixed on the baffle (6.1), and the other end of the high-strength spring is fixedly connected on the rigid connecting block (6.4); the air chambers of the air ducts (6.3) far away from one side of the air cavity (6.2) are communicated with each other through the connecting pipes (6.8), so that the high-strength springs (6.5) deform the same, the maximum spring elasticity borne by the baffle (6.1) is reduced, and the baffle (6.1) is effectively prevented from being damaged due to overlarge elasticity; high-pressure inert gas is filled in the air cavity (6.2) and the air guide pipes (6.3) so that the right wall of the air cavity (6.2), namely the wall surface of the air cavity close to the waterproof geomembrane (1), can be always attached to the surface of the waterproof geomembrane (1), and the air pressure at two sides of the rigid connecting block (6.4) is equal in an initial state; the rigid connecting block (6.4) can move along the axial direction of the air duct (6.3) under the action of left-right gas pressure difference or the elastic force of the high-strength spring (6.5), thereby achieving the effect of controlling the deformation of the expansive soil.
2. The frame anchor supporting structure according to claim 1, wherein the expansive soil of the expansive soil slope (2) has an expansive force of 100 to 200 kPa; the air pressure of inert gas filled in the air cavity (6.2) and the air guide pipes (6.3) is 200-300 kPa; the inert gas is helium.
3. The frame anchor supporting structure according to claim 1, wherein the right wall of the air chamber (6.2) is made of a high-strength material which can be arbitrarily deformed, and the side wall and the left wall of the air chamber are both made of a high-strength material which cannot be deformed, so that the air in the air chamber (6.2) flows only in the air guide pipe (6.3) when the air chamber is deformed and extruded by the expansive soil slope (2).
4. Frame-anchor supporting construction according to claim 1, characterised in that the tube wall of the air duct (6.3) is made of a non-deformable, high-strength material; the rigid connecting block (6.4) is in sealing contact with the inner wall of the air guide pipe (6.3) and can move along the axial direction of the air guide pipe.
5. Frame anchor supporting construction according to claim 1, characterized in that the air duct (6.3) is in circular arc transition connection with the air chamber, the air duct (6.3) is in circular arc transition connection with the connecting pipe (6.8), and the end of the air duct (6.3) is in circular arc transition connection with the side wall of the air duct (6.3).
6. Frame-anchor supporting construction according to claim 1, characterised in that the frame beam (4) and the baffle (6.1) are both of concrete construction, and the rigid connecting block (6.4) is a steel block provided with a sealing ring at its periphery.
7. The frame anchor supporting structure according to claim 1, wherein the left wall surface and the right wall surface of the air chamber are parallel, that is, the air chamber is of a flat cuboid structure as a whole, and the length directions of the plurality of air ducts (6.3) are all arranged to be perpendicular to the left wall surface and the right wall surface of the air chamber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010832176.9A CN111945752B (en) | 2020-08-18 | 2020-08-18 | Frame anchor supporting construction suitable for native slope self-adaptation warp control expands |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010832176.9A CN111945752B (en) | 2020-08-18 | 2020-08-18 | Frame anchor supporting construction suitable for native slope self-adaptation warp control expands |
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| CN111945752B CN111945752B (en) | 2021-04-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605399A (en) * | 2021-07-16 | 2021-11-05 | 中铁大桥勘测设计院集团有限公司武汉分公司 | Connecting device for supporting inner support in foundation pit support and self-adjusting axial force control mechanism |
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| CN113605399A (en) * | 2021-07-16 | 2021-11-05 | 中铁大桥勘测设计院集团有限公司武汉分公司 | Connecting device for supporting inner support in foundation pit support and self-adjusting axial force control mechanism |
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| CN113756279A (en) * | 2021-09-07 | 2021-12-07 | 中铁大桥勘测设计院集团有限公司武汉分公司 | Drainage module, pile unit, expansive soil foundation treatment structure and method |
| CN113756279B (en) * | 2021-09-07 | 2022-09-23 | 中铁大桥勘测设计院集团有限公司武汉分公司 | Drainage module, pile unit, expansive soil foundation treatment structure and method |
| CN116591196A (en) * | 2023-07-17 | 2023-08-15 | 中铁建工集团第二建设有限公司 | Flexible supporting structure of excavation side slope |
| CN116591196B (en) * | 2023-07-17 | 2023-10-10 | 中铁建工集团第二建设有限公司 | Flexible supporting structure of excavation side slope |
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